Delpech, LenaAlberti, StefanoAvramidis, KonstantinosAyreault, AlineBatal, TristanBernard, Jean-MichelBouquey, FrancisChelis, IoannisClairet, FredericCorbel, ElodieDoceul, LouisDurand, FredericDumont, RemiFonghetti, TheoGantenbein, GerdGaribaldi, PascalGiruzzi, GerardoGoodman, TimHogge, Jean-PhilippeIlly, StefanJelonnek, JohnJin, JianboLaqua, HeinrichLegrand, FrancoisLievin, ChristopheMagaud, PhilippeMaget, PatrickManas, PierreMarsen, StefanRegal-Mezin, XavierMollard, PatrickMouyon, DavidNicolas, LaurentOuerfelli, AdamPagonakis, IoannisRobinet, BenjaminRuess, TobiasSantraine, BenjaminThumm, ManfredIoannidis, ZisisWEST team, the W. E. S. T.Delpech, LenaAlberti, StefanoAvramidis, KonstantinosAyreault, AlineBatal, TristanBernard, Jean-MichelBouquey, FrancisChelis, IoannisClairet, FredericCorbel, ElodieDoceul, LouisDurand, FredericDumont, RemiFonghetti, TheoGantenbein, GerdGaribaldi, PascalGiruzzi, GerardoGoodman, TimHogge, Jean-PhilippeIlly, StefanJelonnek, JohnJin, JianboLaqua, HeinrichLegrand, FrancoisLievin, ChristopheMagaud, PhilippeMaget, PatrickManas, PierreMarsen, StefanRegal-Mezin, XavierMollard, PatrickMouyon, DavidNicolas, LaurentOuerfelli, AdamPagonakis, IoannisRobinet, BenjaminRuess, TobiasSantraine, BenjaminThumm, ManfredIoannidis, ZisisWEST team, the W. E. S. T.2023-01-162023-01-162023-01-162023-01-0110.1016/j.fusengdes.2022.113360https://infoscience.epfl.ch/handle/20.500.14299/193883WOS:000898197700003The aim of the WEST experiments is to master long plasma pulses (1000s) and expose ITER-like tungsten wall to deposited heat fluxes up to 10 MW/m2. To increase the margin to reach the H-Mode and to control W-impurities in the plasma, the installation of an upgraded ECRH heating system, with a gyrotron performance of 1MW/1000s per unit, is planned in 2023. With the modifications of Tore Supra to WEST, simulations at a magnetic field B0-3.7T and a central density ne0-6 x 1019 m- 3 show that the optimal frequency for central absorption is 105 GHz. For this purpose, a 105 GHz/1MW gyrotron (TH1511) has been designed at KIT in 2021, based on the technological design of the 140 GHz/1.5 MW (TH1507U) gyrotron for W7-X. Currently, three units are under fabrication at THALES. In the first phase of the project, some of the previous Tore Supra Electron Cyclotron (EC) system components will be re-installed and re-used whenever possible. This paper describes the studies performed to adapt the new ECRH system to 105 GHz and the status of the modifications necessary to re-start the system with a challenging schedule.Nuclear Science & Technologylaunchergyrotronelectron cyclotron heating systemwesttext::journal::journal article::research article